Acceptance and Action Questionnaire for Weight-Related Difficulties. The scale and additional information (scoring instructions and a brief summary of psychometric properties) are attached below.
The AAQ-W can also be found on stevenchayes.com
References:
Lillis, J., & Hayes, S.C. (2008). Measuring avoidance and inflexibility in weight related problems. International Journal of Behavioral Consultation and Therapy, 4(4), 348-354.
Weineland, S., Lillis, J., & Dahl, J. (2013). Measuring experiential avoidance in a bariatric surgery population--psychometric properties of AAQ-W. Obesity research & clinical practice, 7(6), e464–e475.
Manwaring, J., Hilbert, A., Walden, K., Bishop, E. R., & Johnson, C. (2018). Validation of the acceptance and action questionnaire for weight-related difficulties in an eating disorder population. Journal of Contextual Behavioral Science, 7, 1-7
References for AAQ-W Revised Versions:
Palmeira, L., Cunha, M., Pinto-Gouveia, J., Carvalho, S., & Lillis, J. (2016) New developments in the assessment of weight-related experiential avoidance (AAQW-Revised). Journal of Contextual Behavioral Science, 5(3), 193-200. https://doi.org/10.1016/j.jcbs.2016.06.001
Dochat, C., Afari, N., Wooldridge, J.S., Herbert, M.S., Gasperi, M., & Lillis, J. (2020) Confirmatory factor analysis of the Acceptance and Action Questionnaire for Weight-Related Difficulties-Revised (AAQW-R) in a United States sample of adults with overweight and obesity. Journal of Contextual Behavioral Science, 15, 189-196. https://doi.org/10.1016/j.jcbs.2020.01.006